We surgically implant carp with radio or acoustic tags and track them using antennas and receivers. This method is used to locate seasonal aggregations of carp. img_20161004_144341195_hdr img_20161019_101938502 cropped-IMG_20161012_184653336.jpg img_20161004_144341195_hdr img_20161012_184653336 img_20161013_142508205 img_20161019_101938502